Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 297 for “"Telescopes"”.
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Towards Gamma-Ray Telescopes in Australia
… H.E.S.S. in Namibia, are Imaging Air Cherenkov Telescopes (IACTs) that will cover roughly two thirds of the Southern Hemisphere gamma-ray sky. Short-term and variable events, or “transients”, in the Australian night sky would thus be unobservable. To this end, Monte Carlo simulations of …
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The Design and Optimisation of Quasioptical Telescopes
The main focus of this thesis is the analysis and optimisation of systems that operate in the terahertz and submillimetre wavebands. Analysis is carried out on the MBI and ALMA interferometers, and on the HIFI instrument on the Herschel Space Observatory (HSO). MBI is a novel instrument designed to …
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A Rotating Aperture Mask for Small Telescopes
… nearby stars is limited by the power of our telescopes, posing a challenge to astronomers at small observatories that contribute to binary star surveys. Masks placed at the telescope aperture promise to augment the resolving power of telescopes of all sizes, but many of these masks must be …
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Investigating Exoplanets and Transients Using Small-Aperture Telescopes
This work characterises PIRATE’s primary camera, the SBIG STX-16803, as well as assessing the usefulness and impact of a small-aperture semi-autonomous facility in Mallorca for exoplanet studies and studies of transient sources. Additionally, a method for exploring the Roche lobe of an exoplanet …
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Holographic correction of aberrated telescopes / by Geoff Andersen.
This thesis describes research conducted into the holographic correction of aberrations in large optical elements.
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Transit timing with fast cameras on large telescopes
… POETS and MagICe2v on the 6.5m Magellan telescopes, and MORIS on the 3m IRTF. For each planet, all transit light curves including available literature data were jointly fit using a Monte Carlo Markov Chain method, providing accurate new values for the planetary radius and other …
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Measuring transit timing variations of exoplanets using small telescopes
… Challenges of exoplanet observation from small telescopes are discussed. It was determined that overall, transit measurements of many exoplanets using small telescopes can be successful and scientifically useful.
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Embedded Computing for Wavefront Control on Future Space Telescopes
Future space telescopes will use adaptive optics to suppress starlight to directly image and characterize exoplanets. A measurement using this technique may be the first to detect extraterrestrial life in the universe. However, the real-time execution of adaptive optics control algorithms places …
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Orbital Determination Feasibility of LEO Nanosatellites Using Small Aperture Telescopes
<p>This thesis is directed toward the feasibility of observing satellites on the nano scale and determining an accurate propagated orbit using a Meade LX600-ACF 14” diameter aperture telescope currently located on the California Polytechnic State University campus. The optical telescope is fitted …
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Telescopes and Techniques for the High-Resolution Characterisation of Exoplanets
… for use in future large aperture unfolding space telescopes. Such facilities and technologies are needed for conducting the high spatial resolution observations required for characterising Earth-like exoplanets. In this work I have developed an automated alignment routine for telescopes with …
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Optical-level structural modelling of membrane mirrors for spaceborne telescopes
… observation communities desire ever-larger space telescopes, but launch costs limit mass and technology limits size. Current research in large aperture mirrors largely supports deployed rigid optics, but efforts have already begun to develop technology that offers the possibility of a mass-optimal …
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Thin optic surface analysis for high resolution X-ray telescopes
… flat panel displays, hard disk drives, and x-ray telescopes. Methods for manufacturing glass sheets and further sheet shaping processes are covered. Future generation, high resolution x-ray telescopes require thin optics with large surface area to thickness ratio and a surface flatness of -500 nm. …
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Design and Analysis of Quasioptical Components for use in Astronomical Telescopes
This thesis describes the use of Gaussian beam modes (GBM) and physical optics (PO) to design and analyse astronomical telescope systems operating at millimetre and submillimetre wavelengths. The techniques are applied to a proposed re-design of the 3 mm channel of the 20 m Onsala Space Observatory …
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Integrated modeling to facilitate control architecture design for lightweight space telescopes
… and systematic requirements of future space telescopes. New telescope systems are moving toward tighter optical performance requirements with lower mass and cost, creating an implicit conflict for currently designed systems. Therefore, new technology and telescope types must be developed and …
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Development and experimental validation of direct controller tuning for spaceborne telescopes
Strict requirements in the performance of future space-based observatories such as the Space Interferometry Mission (SIM) and the Next Generation Space Telescope (NGST), will extend the state-of-the-art of critical mission spaceflight-proven active control design. A control design strategy, which …
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Robotic telescopes & Doppler imaging : measuring differential rotation on long-period active stars
Auf der Sonne sind viele Phänomene zu sehen die mit der solaren magnetischen Aktivität zusammenhängen. Das dafür zuständige Magnetfeld wird durch einen Dynamo erzeugt, der sich vermutlich am Boden der Konvektionszone in der sogenannten Tachocline befindet. Angetrieben wird der Dynamo teils von der …
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The Feasibility and Application of Observing Small LEO Satellites with Amateur Telescopes
… Aerospace community, through the use of amateur telescopes. A Meade LX200 12 in. telescope and Lumenera Skynyx 2.0 camera were utilized to observe small LEO satellites, using a well-documented point-and-wait staring method. Over a period of three months, a total of 186 observation attempts were …
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MCAO for Extremely Large Telescopes: the cases of LBT and E-ELT
… and of the future generation large ground-based telescopes (diameters in the 8-40 m range). The subject of this PhD Thesis is embedded in this context. Two MCAO systems, in dierent realization phases, are addressed in this Thesis: NIRVANA, the 'double' MCAO system designed for one of the …
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Design and performance analysis of adaptive optical telescopes using laser guide stars
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